Granite

Black Pearl

India

ASTM C615Food-Contact EligibleEtch ResistantScratch ResistantHeat ResistantFrost ResistantExterior-Grade

Black Pearl

Photo coming soon

HardnessHard(6–7 Mohs)

SoftHard

Acid SensitivityAcid Safe

SafeHigh Risk

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True Geology: Gabbro

Black Pearl is commercially sold as granite, but is geologically a gabbro. This affects its actual physical and chemical properties.

Verify Before You Buy

Slab Yard Diagnostic Protocol

Granite is one of the most reliable countertop stones — durable, heat resistant, and rarely mislabeled. A short verification with your Stone ID Kit confirms the slab matches the spec.

From your Stone ID Kit

Glass tileHCl dropper bottle (5–10%)

The full step-by-step protocol — including expected results and red flags — is included in your downloadable Buyer's Guide.

Stone TypeGranite

Geological NameGabbro (commercially granite)

OriginIndia

ASTM SpecificationASTM C615

ClassificationDense Crystalline / Siliceous

Available FinishesPolished, Honed (Matte), Leathered, Brushed, Flamed

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True Geology: Gabbro

Black Pearl is commercially sold as granite, but it is geologically a gabbro. This distinction matters because true geological classification determines the stone's actual physical and chemical properties — which affects how it performs, how it should be maintained, and how it reacts to acids and moisture.

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MB Stone I.D. Kit — Test Your Stone

Not sure what stone you have? This kit includes the tools professionals use to identify stone type, test acid sensitivity, check absorption, and determine the right care products.

Shop Stone I.D. Kit — $139.97